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. 2020 Sep 23;13(19):4241. doi: 10.3390/ma13194241

Figure 5.

Figure 5

Figure 5

The ζ result of ZnO NPs from (a) OPE (b) LPE and (c) GPE (d) showed the comparative zeta potential and particle sizes of the ZnO NPs from the peel citrus extracts.